initial commitHEADmain

2 files changed, 36 insertions, 0 deletions

diff --git a/src/utils/index.ts b/src/utils/index.ts
new file mode 100644
index 0000000..1ff09ef
--- /dev/null
+++ b/src/utils/index.ts
@@ -0,0 +1 @@
+export * from './logger';
diff --git a/src/utils/logger.ts b/src/utils/logger.ts
new file mode 100644
index 0000000..11a24f7
--- /dev/null
+++ b/src/utils/logger.ts
@@ -0,0 +1,35 @@
+export interface TracingLogger {
+  info(log: string): void;
+  warn(log: string): void;
+  error(log: string): void;
+
+  createChild(prefix: string): TracingLogger;
+}
+
+export class ConsoleTracingLogger implements TracingLogger {
+  protected prefix: string;
+
+  constructor(prefix: string) {
+    this.prefix = prefix;
+  }
+
+  private makePrefix(level: 'info' | 'warn' | 'error'): string {
+    return `[${new Date().toISOString()}] ${level} (${this.prefix}) > `;
+  }
+
+  public info(log: string) {
+    console.log(this.makePrefix('info') + log);
+  }
+
+  public warn(log: string) {
+    console.warn(this.makePrefix('warn') + log);
+  }
+
+  public error(log: string) {
+    console.error(this.makePrefix('error') + log);
+  }
+
+  public createChild(prefix: string) {
+    return new ConsoleTracingLogger(`${this.prefix} -> ${prefix}`);
+  }
+}